STANDARD SPECIFICATIONS 



where s = Side clearance from center of rail. 

 v = Vertical clearance from top of rail. 



(a) A wheel-load shall be assumed as distributed in the top 

 flange, over a distance equal to depth of girder, with 

 a maximum of 30 inches. 



(6) In addition to the vertical load, the top flanges of the 

 girder shall withstand a lateral loading of two-tenths 

 d 2 ^) of the lifting capacity of the crane, equally 

 divided between the four wheels of the crane. 

 ii. Impact Loads. For beams, girders, and columns carry- 

 ing traveling cranes an allowance of 25 per cent of the computed 

 moments and shears due to same shall be added to compensate 

 for the effects of impact and vibration. 



UNIT STRESSES: STEELWORK 



12. In designing the component parts of any building the 

 maximum stresses due to the combined effects of axial stresses 

 and bending stresses from dead, snow, wind and live loads, includ- 

 ing impact, if any, shall not exceed, for structural steel and rivet 

 steel, the following values in Ibs. per square inch, except as modi- 

 fied in Pars. 14-16. 



